diff --git a/src/backend/x64/reg_alloc.cpp b/src/backend/x64/reg_alloc.cpp
index 30b3dd6c..ae078c44 100644
--- a/src/backend/x64/reg_alloc.cpp
+++ b/src/backend/x64/reg_alloc.cpp
@@ -230,7 +230,7 @@ bool Argument::IsInMemory() const {
 RegAlloc::ArgumentInfo RegAlloc::GetArgumentInfo(IR::Inst* inst) {
     ArgumentInfo ret = {Argument{*this}, Argument{*this}, Argument{*this}, Argument{*this}};
     for (size_t i = 0; i < inst->NumArgs(); i++) {
-        const IR::Value& arg = inst->GetArg(i);
+        const IR::Value arg = inst->GetArg(i);
         ret[i].value = arg;
         if (!arg.IsImmediate() && !IsValuelessType(arg.GetType())) {
             ASSERT_MSG(ValueLocation(arg.GetInst()), "argument must already been defined");